Kevin Carr

Kevin Carr

Recent posts by Kevin Carr

3 min read

Trends in Additive Manufacturing - 3D Print 2021

By Kevin Carr on May 7, 2021 12:05:47 PM

I almost can't believe I am writing this but I just got back from attending my first live conference since the COVID pandemic hit us!  I was fortunate enough to attend the 2021 Additive Manufacturing Users Conference (AMUG) where the leading users of additive gather to share their knowledge, expertise, and updates on best-in-class additive manufacturing processes.  There is too much to share in just one blog so I will have more follow-up blogs but wanted to start with what the experts noted as the trends they saw in 2020.  In one of the sessions, industry leaders outlined what they believe will be the next areas of success around 3D print in 2021.  Here are my notes from what was presented...

BASF - Noted that they are seeing more traditional injection molding companies looking to leverage additive manufacturing and leveraging 3D print to augment their traditional services.  Historically because of the volume and material needs that injection molders require they have been slower to adopt Additive Manufacturing technologies but BASF believes advancement in materials and throughput will increase the adoption.


DMG Mori - Stated they believe automation around 3D print, enhanced reliability, and improved quality assurance processes will be key for additive.   Much like the notes above from BASF, they believe adoption will also increase as the materials improve for both metal and composites.  In addition, more hybrid systems will be leveraged to take advantage of both traditional and new manufacturing technologies.


Dyndrite - Believes that software solutions have lagged 3D print technology and 2021 will be the year software makes a big step forward to catch up.  With the explosion of manufacturing data, software will need to be developed to run 3D printers more efficiently, quickly and to leverage data better.  The need for technology-agnostic front ends will be another improvement as manufacturers will leverage various 3D print technologies.  

5ede7a19604c7f9b37110831_inlight white_Alpha-p-500

Essentium - Predicts the continued rise of full-scale production, improved leveraging of 3D print for supply chain resiliency, and the development of materials to solve specific applications versus a general material solution.  The trend for true additive manufacturing that occurred in 2020 will continue into 2021.


ExOne - Beyond just the overall desire for 3D metal parts, they see the demand for more metal materials will increase along with the desire to implement additive processes to satisfy green initiatives. There will also be a continued leveraging for metal print for light-weighting and part consolidation.  Metal certainly has a strong future.


Take these as my notes and I encourage you to visit each of their websites to see what they are focused on.  Overall I believe the message was consistent, it's not only about the print technology but the processes utilized both before and after printing.  Design processes and technologies will continue to evolve to better leverage and prepare data for printing.  The post finishing processes will be improved to support a true manufacturing process for both producing parts in quantity but with quality assurance.  Throw in materials development and I believe 2021 will be another step forward to true additive manufacturing.  

As always, if any of the directions I noted above resonate with you (or does not) please reach out as I am always curious to hear real-world feedback.

Lastly, I encourage you to check out the Additive Manufacturing User Group -
The Additive Manufacturing Users Group's origins date back to the early 1990s when the founding industry users group called 3D Systems North American Stereolithography User Group.  Today, AMUG educates and supports users of all additive manufacturing technologies.  If you are at all involved in 3D around production, this is a group you should support and join.AMUGlogotag

More to come in later blogs...

Topics: 3D Printing Additive Manufacturing AMUG
3 min read

Affordable and effective way to dye HP 3D MJF Parts

By Kevin Carr on Nov 20, 2020 11:42:40 AM

Are you struggling to produce consistent results on parts dyed from HP’s Multi Jet Fusion printer? The last step in many users of HP 3D’s technology is to dye the parts so the final result is a deep black – well colored part.   Often, we see various set ups such as crock pots or large pots on burners to dye parts black from the various HP 3D printers. We see this system also in place for dyeing SLS parts. A typical example is below. Over time this process gets messy, time consuming, and provides inconsistent results.

pot dye part

Until recently, the current option for automated dyeing was DyeMansion’s DM60. This unit is the Rolls-Royce of dyeing. We have sold this technology for the last few years and truly has been game changing when you talk true Additive Manufacturing being implemented with high standards and measurable output. The DM60 uses a scientific process teamed with a unique dye system to produce unmatched final parts with repeatable and exact dye results – including color. The DyeMansion has a fit.

But…..what if your budget or process does not call for such an exact dye and your main goal is to replace that large pot dying process? Enter OmegaSonics…they are known for their ultrasonic cleaners but have developed a dye tank specifically to dye parts from HP MJF’s technology. The HP 1818 Dye Tank. The biggest advantage of the Omegasonics solutions? The unit starts at $ 14,995! The time saving and part quality improvements make the ROI on the system less than 12 months – in my opinion of course.

We had a client test the beta unit and have used it for over 5 months with great success. They had previously used a messy pot set up and now have an automated dye process with better results. You can view a video we created of the beta unit using the link below. I want to make sure to note that the final production unit has black outer panels (yes some dye will still cause a mess😊) and the mesh basket shipping with the unit has a finer mesh to hold smaller parts than the beta unit. You can view our video here:


Lastly, let me outline some of the key features:

  • Price – I had to mention that again because at 15K the unit is very affordable.
  • Adjustable Heat - Heat up to 200°F with simple – easy to use controls

  • Robust pump - The key feature of the unit (besides the heated vat) is the circulation of the dye.  This is accomplished with a durable Ryton pump.
  • Large volume capable - Basket is 14" x14" x 15"
  • Overall Build Quality of Unit - Not only is the unit built with high quality, strong materials, it is on casters for portability.
  • Dyed Parts Results - One of the challenges typical pot dying has is under sides of parts are not dyed as well as the side.  Envision the part sitting on the bottom of the pot.  With the circulation of the dye, the final parts have consistent dyed surface on all sides.
  • Throughput - The HP1818 Dye Tank increase the number of parts you can dye in a given time.


As many of you know, the hidden challenge of 3D printing is finishing processes. We are excited to see manufacturers such as OmegaSonics entering the 3D post processing equipment game. I believe this system will be sold with a majority of HP’s 4200 and 5200 series printers.

If you want more information on the unit, feel free to visit us at or contact me directly at


Topics: 3D Printing
3 min read

Create COVID posters with FREE Tool from HP

By Kevin Carr on Aug 13, 2020 10:13:43 AM

How to print your own Covid posters on your HP plotter (wide-format printer)

Companies are spending a lot of money to purchase signage for social distancing, mask requirements, and best hygiene practices. We see this signage every day as we enter a new normal with stores and companies needing to outline their regulations. Often this signage is outsourced but amazingly many businesses can utilize their existing assets – such an HP DesignJet plotter – to create their own signage and utilize specialty media for different applications.

Let’s start with the basics on how to create a sign. You don’t need to be graphic designer to create a sign, the signs are all about communication not marketing. The more concise and direct the better. You can simply use PowerPoint to create signs and use a standard windows print driver to enlarge the output for poster printing. Most Windows drivers are fairly straight forward and easy to us. Simply select the poster size you want – such as 24” x 26” – configure the output to scale to fit and your design will output on a poster size sheet of paper.

In addition, there are free tools and resources to leverage your existing plotter technology.  Below is information on HP's free poster application. This is an example of a template available.Covid HP Image v3

It’s easy to utilize HP's FREE poster application tool to create and print posters.  Designs and officially approved posters for signage are available on
HP Applications Center for all HP DesignJet, PageWide XL, and Latex printers.
HP Poster Application Tool

After creation you can also utilize specialty media. In most cases you can simply print on stand bond – paper – and attach to walls with two sided tape. However, most users don’t know that there is specialty media from vendors such as Canon/Oce that actually have adhesive back for adhering to different surfaces.   Be careful, the adhesive back can be both permanent and removable. Know your application before choosing media. You can simply create, print, peel off the backing, and apply.

One example of an adhesive back material is Canon’s OPPOLYPS. Yes that’s the official SKU! It’s a 6.6 mil Polypropylene Film with Permanent Pressure Sensitive Adhesive.   OPPOLYPS is a 6.6 mil economical, water resistant polypropylene film with permanent, pressure sensitive adhesive.   You can print on it with thermal (most inkjet plotters) or piezo water based inkjet printers. The backside PSA will simplify the mounting and installation process and the water resistant coating means you do not have to laminate when using pigment inks.

Want to learn about other medias?  You can visit Canon’s site for reference at: Canon Plotter Media Selector. You can also visit MasterGraphics’ eStore.   Simply input your plotter model in the left side drop down selection, and see the applicable media for your device. Even though we resell Canon media, the material is applicable to most plotters by various manufacturers.  Plotter Media Selector

If you don't see what you need or want guidance, feel free to contact us at 866-914-9610 or email us at


As always, if you have any question or input, don't hesitate to reach out to me at

Topics: Technical & Graphics Printing
3 min read

What is the number one reason to leverage 3D printing?

By Kevin Carr on Aug 10, 2020 12:21:53 PM

What is the number one reason to leverage 3D printing?  My new answer.....Innovation.

Having been involved in the 3D print industry for over a decade, many people ask me the reasons for implementing 3D print.  My standard answer is usually it's not just one reason but it's the desire for a company to reduce time to market, produce goods not possible before, reduce costs, and be more innovative.  The last item innovation being the one that very rarely people asked me to expand on.  In reading a recent article from Kathleen Gallagher from the BizTimes in Milwaukee I had an aha moment.  We should all focus on innovation!

She wrote a great article on the recent struggles of Briggs and Stratton and their lack of innovation.  You can read her article here:   BizTime Viewpoints: Lack of innovation explains collapse of Briggs & Stratton

I do realize the challenges Briggs and Stratton faced went well beyond innovation but it put it in perspective when I try to work with clients to help explain how best in class companies are leveraging 3D print.  Most people look to 3D printing for prototypes or to replace existing processes directly but what we need to look at is how to be innovative in leveraging game changing technology whether 3D print or something else.  With 3D print technologies from HP and Carbon, now is the time to really look at not only your current challenges but future opportunities.  Look to be innovative.  It won't be fast or simple but look to be a game changer to ensure your future success. 

When I look at the typical design process I break it into 4 basic steps.  

  1. Sales/Marketing - Develop an idea
  2. Design & Engineering - Create the actual design
  3. Test & Validation - The process to produce the good is developed
  4. Manufacturing & Production - Goods are actually produced

This design wheel represents my view.wheel

To me – if you apply “innovative” thinking to each step and how 3D printing can move your company forward – this is the future we desire. Of course we will still have the standard applications where prototypes improve time to market or decrease errors but real innovation will come when you look at additive manufacturing differently. You will need to change old processes, put new standards in place, think differently, etc… This needs to start at a management level so that employees are encouraged to challenge old ways and look at new markets. Often we see the end engineers using 3D print to solve current pains – not develop new applications or markets.

Getting back to Kathleen’s article, it’s tough for any company to survive 100+ years and the only way to do so is evolve and innovate. You can’t be the same company over time. Think of Apple and Microsoft for how they have evolved and innovated. Even MasterGraphics as a smaller company has only been able to survive 70+ years because we have evolved and re-innovated ourselves to be completely different than we were from our origins. Yes, we serve the same industries, but with different solutions.

I encourage you to really step back, to view 3D print anew and how it may be able to move your business forward. At the beginning the end goal is usually a “pipe” dream but as we all have experienced, it does not take long for innovation to deliver on future dreams. Hello self driving cars!

I look forward to any thoughts about what I wrote – even challenges to my thinking. You can take a closer look at the latest 3D print technologies here but most importantly if you want to have a discussion around innovation – don’t hesitate to reach out to me.


Topics: 3D Printing
1 min read

How educators can lead the way with 3D print

By Kevin Carr on May 15, 2020 3:37:09 PM

I wanted to share a great eBook from HP on how educators can lead the way into the industry of tomorrow.  This eBook explores how 3D printing began, how it has evolved, and how it will change the culture of design, as well as the potential of 3D printing for higher education.  The principles outlined mirror many of our other blogs we have posted so make sure to check out the rest of our expert center to learn more.  I truly believe our students are the future for leveraging 3D print and we need to ensure they are learning and applying the technology for the implementing Industry 4.0.  We at MasterGraphics are always looking to support education so don’t hesitate to reach out to me directly with any questions or requests for support.  For now – download this eBook and enjoy.  

Kevin Carr



Topics: 3D Printing
2 min read

MasterGraphics Coronavirus Supply Statement

By Kevin Carr on Mar 18, 2020 9:46:56 AM

As the current situation with COVID-19 (known as coronavirus) continues to evolve, MasterGraphics wants to assure you that we are working to protect our employees, customers and partners. Health and safety remain our highest priority.

We are committed to being responsive to the needs of our customers as this dynamic situation evolves. We are monitoring this situation and want to ensure minimum disruptions, and to make sure we do everything we can to provide you the support you need.  The plans we have in place are designed to ensure our continued service to you.

Here are some steps MasterGraphics has taken to address the risk of COVID-19:

  • Evaluated travel restrictions for associates to eliminate or reduce travel when possible and reviewed facility access for associates and visitors to minimize the risk of exposure
  • Ensured availability of alcohol wipes, sanitizers, tissues, and other needed supplies for use in the workplace
  • Developed contingency planning for alternative work arrangements such as working from home

And, here are some vendor replies regarding the steps they’re taking to minimize the impact to our customers:

HP (SYNNEX): (ink & 3D Supplies) We are increasing our warehouse inventory to ensure continued fulfillment on demand and to minimize the impact to our customers. We are managing our supply chain and making every effort to understand and offset the potential impact of production and delivery delays.

OCE' / CANON (media): We are in close contact with our vendor and supply network as they work through potential supply chain issues resulting from the COVID-19 issue.  Our commitment is to take proactive and proportional steps in accordance with the guidance we receive from government and public health authorities.  These actions are designed to minimize the risk of virus spread among our employees and Canon workplaces while ensuring effective business continuity. 

DIETZGEN (media): We do not anticipate any shortages or delays due to the Coronavirus at this time. We will continue to work with our manufacturing partners to monitor any impact to the supply chain that might cause an interruption or delay. While it is more difficult to confirm available logistics and delivery dates at this time, we believe our global manufacturing and logistics capabilities will keep us well positioned to work through these challenges.  We have taken steps to ensure the safety and wellness of our employees and secure our product supply chains.

MasterGraphics appreciates your business and we remain committed to providing the superior service and support that our customers have come to expect of us.  Don’t hesitate to reach out to us with questions or concerns.

Kevin Carr

MasterGraphics Incorporated, with a corporate office located in Madison, WI, is deemed as an “Essential Critical Infrastructure Workforce” based on the recently released guidelines published by the Cybersecurity & Infrastructure Security Agency (CISA). We are part of the supply chain to various Energy, Government, Communications, Healthcare, and Critical Manufacturing facilities in the United States. Therefore, our continued supply of services, equipment, and other services will continue without interruption.

Topics: News
5 min read

Comparing HP’s 4200 Multi Jet Fusion (MJF) printer to their 5200 Multi Jet Fusion Printer (MJF)

By Kevin Carr on Oct 2, 2019 12:18:17 PM

HP recently announced the expansion of their Multi Jet Fusion (MJF) printer line up to include the new 5200 series.  This has created many questions around the difference between the recently announced 5200 and the existing 4200 since architecturally they look similar.  Let me take a quick step back and provide some background on the 4200 before I get into the differences.  HP launched their ground breaking 3D print technology (MJF) with the 4200 back in 2017.  The 4200 provided revolutionary 3D print technology that moved forward the ability to mass print plastic (PA12 at launch) parts at speeds, cost, and ease of use not seen before in additive manufacturing.  I describe MJF as Selective Laser Sintering (SLS) on steroids.  HP’s MJF technology truly changed the 3D print market and started a further shift from prototyping to manufacturing.  You can see how the 4200 built new service bureaus who grew based on HP’s technologies and how companies now manufacture truly use parts from the 4200 as final parts.  Here are some of those service bureaus who have grown substantially due to HP. 

re3dtech            forcast3d     fast radius

Personally in my 12 years spent within 3D printing, I have not seen any other technology change the 3D print landscape like the 4200.   The 4200 met its promise to bring Additive Manufacturing to the masses.  Earlier this year, HP started shipping the 500 series that added the ability to print color but lacked the throughput of the 4200.  The differentiation between the 500 series and the 4200 was clear.

Now to the introduction of the 5200, how does this fit in the evolution of HP’s technology? The 5200 does not replace the 4200.  The 4200 will stay as a production unit and still provides manufacturing capability.  The 5200 is the next step forward to increase throughput and most importantly provides tools and processes for manufacturers to replicate the manufacturing standards and processes they currently use in production.  It has more advanced software when compared to the 4200 and provides a feedback loop to allow even better control of output quality.  The 5200 is sold at a premium price so depending on your needs, the 4200 still may be a fit. 

hp 5200

Here is an outline of some of the key advancements now offered with the 5200 versus the 4200.  Keep in mind the goal of the 5200 is to bring true manufacturing predictability and standards to Additive Manufacturing and provide even faster throughput.

Breakthrough Economics vs the 4200

Up to a 30% cost per part savings due to multiple machine advancements including:

  • One pass printing (versus two on the 4200) resulting in up to 50% less agent consumption
  • Shorter routine on print head wipes needed as part of the print process
  • 4x longer cleaning roll for better cost efficiency

Improved throughput

Warm up time cut in half versus the 4200

  • Faster print times: 5200 in balanced build mode finishes a full build in 11.5 hours compared to 14 hours by the 4200 in balanced mode.
  • Enabled via 1 pass printing vs 2 passes- creating the true ability to get two full builds in 24 hours
  • Fast build mode reduced to 9 hours from 11.5 hours versus 4200.

Manufacturing standards and controls designed into the printer and software.

  • The 5200 has the capability to reach a Cpk of 1.33 on an IT scale of 13. Process capability index (Cpk) is a statistical tool, to measure the ability of a process to produce output within customer’s specification limits. In simple words, it measures producer’s capability to produce a product within customer’s tolerance range. Cpk of 1.33 equals a process yield of 99.99%
  • The new Process Control Center software focuses on calibrating Z dimensional accuracy for improved accuracy and repeatability to achieve more accurate output.
  • Production software is enabled on the 5200, it uses data feedback from the printer to adjust settings and learn as it prints to improve accuracy and reliability based on the advanced sensor built into the 5200.
  • Improved Heating control: the 5200 now has 22 lamps with 14 zones of control (compared to 20 lamps with 12 zones of control on the 4200) – 5X better thermal camera and improved data feedback to measure more minute heating variations, and therefore provide more precise heating adjustments.

Screenshot of the Process Control Center

3d process control

There are some significant hardware differences to improve manufacturability:

  • Better cooling of the print heads to eliminate print failures
  • Improved Lamp control: The lamps are now engineered to only use about 50% of their capability which allows improved reliability and the printer can now more easily “throttle up” or “throttle down” the lamp control (in smaller increments) to more precisely control the heat to specific areas of the print bed based on the improved thermal readings from the thermal camera.
  • Lamps will now always stay “on” thus allowing for longer lamp life eliminating the cycling of on/off that would reduce lamp life
  • Smaller micron layers than the 4200 – now 110 micron layers
  • Semi-Automated Printhead alignment: This new process assures X&Y dimensional accuracy
  • There have also been improvements in airflow via better seals, fans, and flow-through (via a 2nd “Lung” on top left of machine)
  • Machine now has fans & sensors to mitigate against suction/pressure variations created at customer site

New materials support

  • Machine designed to support materials up to 225C which enables a larger breadth of material possibilities
  • Build unit designed to work with lower flow type materials
  • There are redesigned ramps for the material to better flow inside the build unit
  • Processing station redesigned to be able to unpack materials at higher temperatures
  • Ultrasonic sieve (in processing station) with a wider mesh thus enabling more versatility to supporting new materials
  • TPU Material available from BASF: BASF TPU01
Improved Post Processing
  • HP has developed specific natural cooling units to allow the cooling of builds without leaving them in the build carts.
  • As special Hovmand Forklift allows the moving of the cooling units from the build cart for improved productivity.

hp natural cooling

These are just some of the highlights.   I encourage you to look closer at the 5200 if you are looking to implement true additive manufacturing.  The 4200 still has a place in the prototype and production space but if you want to have a system designed for manufacturing with specific measurable standards in place, the 5200 is worth investigating. 

Feel free to contact me at or 847-704-4029

Email Jim


Topics: 3D Printing
5 min read

What type of images can be printed and what type of medias can be used on a PageWide XL?

By Kevin Carr on Oct 2, 2019 11:24:30 AM

  • Océ 45111 is a 20 lb uncoated bond paper. Ideal for all general purpose copying and printing. The bright white sheet provides strong visual contrast. Océ engineering bond is manufactured to control curl and static. 3" core, untaped, available in 500' or 650' lengths.
  • 24LB Coated Bond – Oce' PM24
  • Océ 24 lb. Bond matte coated with bright white base. Inkjet receptive coating on front-side and anti-curl treatment on the backside. 



Type of Image: Company announcements, Signage, Information Boards

Recommended Media:

  • 48LB Heavy Weight Matte Presentation Paper – HW48 – A 48lb (180 gsm), is an economical, bright white matte coated paper. This heavyweight coated paper is durable for short-term outdoor applications. It delivers water-resistant prints with no need for lamination when using pigment inks. This coating produces crisp lines, dense blacks and vivid colors with a fast dry-time.
  • 24LB Coated Bond with Removable backing – Oce' ABBND; a bright white stock with an acrylic repositionable microspehere adhesive on the back that will mount to a variety of surfaces. This product is an excellent choice for indoor signage. The thin silicone release liner removes easily for quick mounting. Physical properties: 90gsm, 5mil, Opacity 91, Whiteness 94, Brightness 84, 3" core.
  • 7mil Satin Resin Coated Photo Paper – Oce' PHPR7 is a 7mil satin resin coated photo paper. Main Applications are indoor display graphics, POP, posters and presentations.



Type of Image: Project Management Organizations, Construction Site Information,

Recommended Media:

  • 48LB Heavy Weight Matte Presentation Paper – HW48 – Described above
  • 24LB Coated Bond with Remove bale backing – Oce' ABBND – Described above
  • 7mil Satin Photo – Oce' PHP7 is a satin resin coated photo paper. Main applications include indoor display graphics/POP, posters and presentations
  • 8mil water resistant Polypropylene banner – Oce' 6008 is a polypropylene film designed to be used for short term outdoor graphics. Oce' 6008 is weather resistant and virtually waterproof. It can be used outdoors without lamination.



GIS Maps

Type of Image: GIS Images

Recommended Media

  • 24lb Coated Bond Oce' PM24



Point of Purchase (POP) Signs

Type of Image: Retail Signs, Sales Signs

Recommended Media:

  • 24LB Coated Bond with removable backing – Oce' ABBND – Explained Above
  • 7mil Satin Photo – Oce' PHPR7 – 8mil water resistant Polypropylene banner – Oce' 6008 is designed to be used for short term outdoor graphics and is weather resistant and virtually waterproof. 
media 5


Type of Image: Various large format signs

Recommended Media:

  • 5mil Water-resistant Matte Vinyl with PSA– Oce' OPVYNLPS – A 3.5 mil water-resistant, matte calendered vinyl with PSA. Whether you are creating a short term outdoor sign, or a long term indoor banner, Oce' OPVYNLPS is the perfect choice.   Specially designed for use with dye and pigment inks, Oce' OPVYNLPS can be used with or without lamination.
  • 15mil Universil Economy Scrim Vinyl – Dietzgen 90042040 is a bright white scrim vinyl banner. It has scratch and waterproof matte coating and is tear resistant polyester fabric that is sandwiched between two layers of white vinyl.
  • Oce' 10 mil Tyvek banner is a matte inkjet coated, tear resistant Tyvek. Inkjet coating compatible with many wide-format thermal and piezo inkjet printers. Durable and water resistant inkjet-receptive topcoat. Dye and pigment based printing capability for indoor and outdoor banner material. Very high tear strength and easy for grommeting and sewing. 
  • 6 mil Polypropylene film with permanent pressure sensitive adhesive – Oce' OPPOLYPS is a 6.6 mil economical, water resistant polypropylene film with permanent pressure sensitive adhesive. Whether you are printing on thermal or piezo waterbased inkjet printers, the result will be brilliant color every time. The backside PSA will simplify the mounting and installation process and the water resistant coating means you do not have to laminate when using pigment inks.


Gift Wrap – Can you believe this one?

Type of image: Anything you want

Recommended Media:

  • Satin wrapping paper – HP Z6G71A can produce high-quality wrapping paper and posters that provide excellent image quality. The paper dries quickly and stays intact with handling-avoiding smudges and smears.
wrapping paper


Keep in mind if you have other large format inkjet printers we may have similar media to the above but specific to your advice.  Don’t hesitate to contact us for more information. 

Check out more media options at

Topics: Technical & Graphics Printing

The Evolution of 3D Print and Additive Manufacturing

By Kevin Carr on Sep 6, 2019 1:26:15 PM

In this episode Kevin Carr, President of MasterGraphics shares his view on the Evolution of 3D Print & Additive manufacturing over the past 30 years.



Topics: 3D Printing